TY - JOUR
T1 - A Multi-Mechanisms Composite Frequency Up-Conversion Energy Harvester
AU - Li, Ping
AU - Xu, Nuo
AU - Gao, Chunhui
N1 - Publisher Copyright:
© 2020, Korean Society for Precision Engineering.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - In this paper, a novel broadband hybrid piezoelectric-electromagnetic-electrostatic energy harvester with frequency up-conversion is proposed to improve the harvesting bandwidth and energy conversion efficiency. The designed device generates vibration energy with much higher frequency than ambient vibration frequency, which uses the magnet to impact periodically on the piezoelectric cantilever with the top electrode of electrostatic element. The dynamic model of the hybrid energy harvester is established, and performances are experimental tested under the sinusoidal excitation and practical application environment. The results show that multi-mechanisms composite structure can realize the complementary advantages of electrostatic-piezoelectric-electromagnetic mechanisms and improve the energy conversion efficiency effectively compared with a single harvesting mechanism. The fabricated harvester can output electric energy in the frequency range of 1–38 Hz, which significantly reduces frequency dependence, and the maximum power is measured to be 11.7 mW and 12 mW during cycling and walking respectively, which is the sum of the power generated by three different elements. Furthermore, the fabricated prototype can also light up six light-emitting diodes (LEDs) simultaneously when handy shaking.
AB - In this paper, a novel broadband hybrid piezoelectric-electromagnetic-electrostatic energy harvester with frequency up-conversion is proposed to improve the harvesting bandwidth and energy conversion efficiency. The designed device generates vibration energy with much higher frequency than ambient vibration frequency, which uses the magnet to impact periodically on the piezoelectric cantilever with the top electrode of electrostatic element. The dynamic model of the hybrid energy harvester is established, and performances are experimental tested under the sinusoidal excitation and practical application environment. The results show that multi-mechanisms composite structure can realize the complementary advantages of electrostatic-piezoelectric-electromagnetic mechanisms and improve the energy conversion efficiency effectively compared with a single harvesting mechanism. The fabricated harvester can output electric energy in the frequency range of 1–38 Hz, which significantly reduces frequency dependence, and the maximum power is measured to be 11.7 mW and 12 mW during cycling and walking respectively, which is the sum of the power generated by three different elements. Furthermore, the fabricated prototype can also light up six light-emitting diodes (LEDs) simultaneously when handy shaking.
KW - Frequency up-conversion
KW - Multi-mechanisms composite
KW - Piezoelectric-electromagnetic-electrostatic
KW - Random excitation
UR - http://www.scopus.com/inward/record.url?scp=85087086784&partnerID=8YFLogxK
U2 - 10.1007/s12541-020-00371-3
DO - 10.1007/s12541-020-00371-3
M3 - Article
AN - SCOPUS:85087086784
SN - 2234-7593
VL - 21
SP - 1781
EP - 1788
JO - International Journal of Precision Engineering and Manufacturing
JF - International Journal of Precision Engineering and Manufacturing
IS - 9
ER -